Cesium carbonate → Tert-Butyl 4-(6-(5-Bromo-1-methyl-2-oxo-1,2-dihydropyridin-3-ylamino)pyridin-3-yl)-3-oxopiperazine-1-carboxylate

HRID 1919138Notes

Reaction equation

[NH2:1][C:2]1[N:7]=[CH:6][C:5]([N:8]2[CH2:13][CH2:12][N:11]([C:14]([O:16][C:17]([CH3:20])([CH3:19])[CH3:18])=[O:15])[CH2:10][C:9]2=[O:21])=[CH:4][CH:3]=1.Br[C:23]1[C:24](=[O:31])[N:25]([CH3:30])[CH:26]=[C:27]([Br:29])[CH:28]=1.CC1(C)C2C(=C(P(C3C=CC=CC=3)C3C=CC=CC=3)C=CC=2)OC2C(P(C3C=CC=CC=3)C3C=CC=CC=3)=CC=CC1=2.C([O-])([O-])=O.[Cs+].[Cs+]>O1CCOCC1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.[Pd].[Pd]>[Br:29][C:27]1[CH:28]=[C:23]([NH:1][C:2]2[N:7]=[CH:6][C:5]([N:8]3[CH2:13][CH2:12][N:11]([C:14]([O:16][C:17]([CH3:18])([CH3:20])[CH3:19])=[O:15])[CH2:10][C:9]3=[O:21])=[CH:4][CH:3]=2)[C:24](=[O:31])[N:25]([CH3:30])[CH:26]=1

Participants

Conditions

Temperature: 110 °C

Procedure

A reaction vessel was charged with 332c (946 mg, 3.2 mmol) in 40 mL of anhydrous 1,4-dioxane, 3,5-dibromo-1-methylpyridin-2(1H)-one (1.11 g, 4.2 mmol), tris(dibenzylideneacetone)dipalladium(0) (146 mg, 0.16 mmol), Xantphos (185 mg, 0.32 mmol), and Cs2CO3 (2.6 g, 8.0 mmol). After three cycles of vacuum/Argon flash, it was stirred at 110° C. for 4 h. The reaction mixture was filtered and the filtrate was evaporated in vacuum. The crude was purified by silica-gel column chromatography eluting with 50:1 methylene chloride/methanol to afford 332d as a yellow solid (706 mg, 46%). MS: [M+H]+ 479.

Workup

filtrationThe reaction mixture was filtered
customthe filtrate was evaporated in vacuum
customThe crude was purified by silica-gel column chromatography
washeluting with 50:1 methylene chloride/methanol

Sources & evidence

ORD record: ord-b39d527ec9374dc08df352b04acf45d8
Source dataset: uspto-grants-2013_12
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08618107B2

Reaction notes

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